''Lyctus brunneus'' is a

xylophage Xylophagy is a term used in ecology to describe the habits of an herbivorous animal whose diet consists primarily (often solely) of wood. The word derives from Greek language, Greek ''ξυλοφάγος'' (''xulophagos'') "eating wood", from '' ...

(wood-eating) insectWood Eating Bugs - Insects That Eat Wood
Animal Wised, accessed 31 July 2020. a species of

beetle Beetles are insects that form the order Coleoptera (), in the superorder Endopterygota. Their front pair of wings are hardened into wing-cases, elytra, distinguishing them from most other insects. The Coleoptera, with about 400,000 describ ...

in the family

Bostrichidae The Bostrichidae are a family of beetles with more than 700 described species. They are commonly called auger beetles, false powderpost beetles, or horned powderpost beetles. The head of most auger beetles cannot be seen from above, as it is down ...

. It is a member of the subfamily

Lyctinae Powderpost beetles are a group of seventy species of woodboring beetles classified in the insect subfamily Lyctinae. These beetles, along with spider beetles, death watch beetles, common furniture beetles, Dermestidae, skin beetles, and others ...

, the powderpost beetles. It is known commonly as the brown powderpost beetle or brown lyctus beetle. Today it is distributed worldwide but it was probably originally native to the

Neotropical realm The Neotropical realm is one of the eight biogeographic realms constituting Earth's land surface. Physically, it includes the tropical terrestrial ecoregions of the Americas and the entire South American temperate zone. Definition In bioge ...

. Like other powderpost beetles, this species lives in wood.Pest Notes: Wood-Boring Beetles in Homes.
Agriculture and Natural Resources, University of California. UC ANR Publication 7418.

References

Bostrichidae Beetles described in 1830 {{Bostrichidae-stub